<html>
<head>
    <title>环保工程季度数据报表</title>
</head>
<body>
<table width="550" border="6" align="center"></table>
<caption>环保工程季度数据报表</caption>
<thead style="background: #0af"></thead>
<tr>
    <th>季度</th>
    <th>销量</th>
</tr>
</thead>
<tbody style="background: #6cc"></tbody>
<tr>
    <td>一季度</td>
    <td>12</td>
</tr>
<tr>
    <td>二季度</td>
    <td>11</td>
</tr>
<tr>
    <td>三季度</td>
    <td>13</td>
</tr>
<tr>
    <td>四季度</td>
    <td>12</td>
</tr>
</table>
<tfoot style="background: #ff6"></tfoot>
<tr>
    <td>季度平均工程数量</td>
    <td>12</td>
</tr>
<tr>
    <td>总计</td>
    <td>12</td>
</tr>
</tfoot>
</table>
</body>
</html>